Synthesis of Functional Block Copolymers Carrying One Poly(p-phenylenevinylene) and One Nonconjugated Block in a Facile One-Pot Procedure

Abstract

Block copolymers composed of a MEH−PPV block and a nonconjugated functional block (molecular weights between 5 and 90 kg/mol) were synthesized in a facile one-pot procedure via ROMP. This one-pot procedure permits the synthesis of numerous block copolymers with little effort. Amphiphilic block copolymers were obtained via incorporation of oxanorbornene carrying a PEG side chain as well as via postpolymerization modification of a reactive ester carrying norbornene derivative with methoxypoly-(ethylene glycol)amine. These amphiphilic block copolymers can be self-assembled into micelles exhibiting different sizes (60−95 nm), morphologies (micelles or fused, caterpillar-like micelles), and optical properties depending on the polymer composition and the micellization procedure. Furthermore, the reactive ester carrying block copolymers enabled the introduction of anchor groups which facilitated the preparation of nanocomposites with CdSe/CdZnS core−shell QDs. The obtained composites were studied using time-resolved photoluminescence measurements. The results revealed an increased interaction based on an accelerated decay of the QD emission for composites as compared to the mixture of the QDs with unfunctionalized polymers.

Synthesis and ROMP of Benzothiadiazole Paracyclophane-1,9-Dienes to Donor–Acceptor Alternating Arylenevinylene Copolymers

“…The ruthenium carbene initiated ring-opening metathesis polymerization (ROMP) of strained paracyclophanedienes − and paracyclophanetrienes is an elegant strategy to prepare PPVs with good control of molecular weight, narrow dispersities, and minimal backbone defects. ROMP of the alkoxy- and alkyl-substituted paracyclophanedienes , and paracyclophanetrienes leads to PPVs that are more electron-rich than the parent unsubstituted polymer.…”

Living Light-Induced Crystallization-Driven Self-Assembly for Rapid Preparation of Semiconducting Nanofibers

“…Another copolymer, P1b 50 - b - P2 15 , was prepared by one-shot ROMP using oxanorbornene (ONB) derivatives containing biocompatible polyethylene glycol (PEG, 1b ) , which showed good solubility in various solvents ( M n = 29.5 kDa, Đ = 1.22, Table , entry 4). This simple one-shot protocol to prepare BCPs containing easily functionalized PNB , and fluorescent and semiconducting PPV will further broaden the scope and preparation of functional polymer materials.…”

Synthesis and folding behaviour of poly(p-phenylene vinylene)-based β-sheet polychromophores

“…PPVs are well-known to engage in face-to-face π–π stacking,41 and are accessible through ROMP 42–45. To connect the PPV strands, we polymerize norbornenes containing phenyl and perfluorophenyl46 pendant groups that participate in quadrupole interactions. The resultant tetrablock copolymer framework is soluble in common organics ( e.g.…”